1 The lac operon consists of three structural genes, and a promoter, a terminator, regulator, and an operator. 2  The three structural genes are: lacZ, lacY, and lacA.n this case, when lactose is required as a sugar source for the bacterium, the three genes of the lac operon can be expressed and their subsequent proteins translated: lacZ, lacY, and lacA.
NEC Corporation (æ¥æ¬é»æ°æ ªå¼ä¼ç¤¾, Nippon Denki Kabushiki Gaisha) is a Japanese multinational provider of information technology (IT) services and products, headquartered in Minato, Tokyo, Japan.
Amtrak is the primary owner of the Northeast Corridor. (NEC) outside of Massachusetts, including the right of. way used by MBTA commuter rail in Rhode Island . The MBTA owns the all of NEC right of way in. Massachusetts, and MBTA contracts with Amtrak in. order to make Amtrak responsible for operating and.